Automatically sharpening shears.



No. 874,847. l

PATBNTBD W124, 19o?. J.- E. HULSE. AUTUMATIGALLY SHARPENING sHEARs.

APPLICATION FILED SEPT. 12, 1907.

H [f1/NE@ N K7@ M @Jac QZ; BY W/QL/ JEROME E. HULSE, OF ALBANY, NEWYORK.

AUTOMATICALLY SHARPENING SHEARS.

Specification of Letters Patent.

Patented Dec. 24, 1907.

Application filed September l2, 1907. Serial No. 392x51I- To all whom itmay concern:

Be it known that I, JEROME E. HULsE, a

citizen of the United States, residing at Al- Sharpening Shears; and Ido hereby declare the following to be a full, clear, and eXactdescription of the invention, such as will enable others skilled in theart to which it ap pertains to make and use the same, reference beinghad to the accompanying drawings, and to theletters and figures ofreference marked thereon, which form a part of this specification.

rlhis invention relates to new and useful improvements in shears and theobject of the invention is to produce a sim le and efficient devicecomprising means w iereby scissors or shears may be automaticallysharpened and so arranged that the pressure of the adjacent shearingedges of the blades may be regulated.

The invention comprises various details of construction and combinationsand arrangements of parts which will be hereinafter fully described andthen specifically defined in the appended claims.

I illustrate my invention in the accompanying drawings, in which z-Figure l is a perspective view of a pair of shears having my inventionapplied thereto. Fig. 2 is a perspective view of the reverse side of theshears. Fig. 3 is a sectional view through the pivotal portion of theshears. Fig. 4 is a detailed perspective view showing the manner ofholding the nut from turning as the screw is tightened or loosened, andFig. 5 is a detailed view of a leaf spring.

Reference now being had to the details of the drawings by letter, A andB designate two blades of a pair of shears, which blades are of theusual construction. Said blades are provided with apertures A and Brespectively adapted to receive a bolt or screw D, and E designates anut which is mounted upon the threaded end of said bolt or screw.

F designates a leaf spring, one end of which is cut away asat Fconforming to the outer surface of the blade A against which itfrictionally contacts, the end being angled as shown. The opposite endof the leaf spring is provided with a lug G, which normally engages anindenture or hole H formed in the outer face of the blade A. Said leafspring is provided with an aperture I for the reception of said bolt orscrew, and K designates a coiled spring interposed between the outerface of theplate A and the inner face of said leaf spring and serves toprevent the leaf spring from being compressed at its center while heldunder compression against the face of the plate A. A

O designates awasher having two Wings O which are adapted to be bentvover the edge of one of the blades, and also two oppositely disposedwings Q, which are bent at right angles to the length of the washer andare adapted to engage over the opposite edges of the nut E, which latterhas a provided opening to receive the end of the screw. By this means itwill be noted that the nut will be held for loosening upon the screw,and will allow the adjustment of the screw as may be desired,to regulatethe frictional contact between the adjacent faces of the blades.

By the provision of the apparatus as shown and described, it will beobserved that means is afforded whereby the blades of shears may beautomatically sharpened by the spring causing the adjacent faces of theblades to contact with each other, thereby keeping the edges sharp atall times. The joint between the blades will be sufciently flexiblewhereby the latter may adjust themselves to different thicknesses ofcloth.

By the provision' of the mechanism shown and described, it will be notedthat the cheapest grades of shears may be kept in the best cutting orderand automatically sharpened as used.

What I claim to be new is l. In combination with the blades of shears, ascrew upon which the blades are pivoted, a nut upon the screw, a leafspring engaged by said screw and held against the face of one of theblades, a coil spring interposed between the le af spring and one of theblades, a washer mounted upon the screw adapted to engageI the edges ofone of the blades, and means for preventing the nut from turningindependent of the washer, as set forth.

2. In combination with the blades of shears, a screw upon which theblades are pivoted, a nut upon the screw, a leaf spring engaged by saidscrew and held against the face of one of the blades, a coil springinterposed between the leaf spring and one of the blades, a washermounted upon the screw adapted to engage the edges of one of the blades,and Wings said screw and held against the face of one of upon saidwasher adapted to engage the ope l posite edges of said nut, as setforth.

3. In combination with the blades of shears, a screw upon which theblades are pivoted, a nut upon the screw, a leaf spring engaged by saidscrew and held against the face of one of the blades, a coil springinterposed between the leaf spring and one of the blades, a washermounted upon the screw adapted to engage the edges of one of the blades,and one end of said leaf spring being angled and adapted to bear againstthe face of one of the blades, as set forth.

4. In combination with the blades of shears, a screw upon which theblades are pivoted, a nut upon the screw, a leaf spring engaged by theblades, a coil spring interposed between the leaf spring and one of theblades, a washer mounted u on the screw adapted to engage the edges ofone of the blades, and the opposite end of the leaf spring having a lugadapted to engage an indenture in the face of the blade, as set forth.

5. In combination with the blades of shears, a screw passing throughregistering apertures therein, a nut upon said screw, means forpreventing the nut moving independent of the screw, a leaf spring havingan aperture through which said screw passes, one end of the leaf springhaving a lug, an indenture in the outer face of one of the bladesengaged by said lug, the opposite end of the leaf spring being angledand conforming to the outer surface of the blade against which itoontacts, a coiled spring mounted upon the screw and interposed betweenthe leaf spring and the shear blade, as set forth.

In testimony whereof l hereunto aHiX my signature in the presence of twowitnesses.

JEROME E. HU LSE. Witnesses:

lV. M. BROWN, WESLEY R. JoHNsoN.

